Calculators

Estimate the minimum transfer switch amp rating needed for a generator installation based on generator output, voltage, phase, continuous loading, and safety margin.

Estimate the battery capacity in watt-hours needed for a portable power station based on device wattage, quantity, daily runtime, days of use, and efficiency reserve.

Estimate the recommended generator size needed to support an inverter system based on inverter continuous power, surge load, inverter efficiency, and desired headroom. This calculator helps size a generator in watts so it can reliably supply the inverter and connected loads.

Estimate the minimum generator size needed to run a battery charger based on battery bank voltage, charger current, charger efficiency, and desired generator headroom.

Estimate how long it will take a generator to charge a battery based on battery capacity, current state of charge, charger output, battery chemistry, and charging efficiency losses.

Estimate the time required to charge a battery bank with a generator based on battery capacity, current state of charge, target state of charge, charger current, and charging efficiency.

Estimate how long it will take to charge a solar generator based on battery capacity, current battery level, solar panel input, charging efficiency, and average sun hours factor.

Estimate how long a solar generator can power your devices based on battery capacity, device wattage, inverter efficiency, battery depth of discharge, and solar input.

Estimate the recommended solar generator battery capacity based on your daily energy use, desired backup duration, depth of discharge, and inverter efficiency.

Estimate the required battery backup system size in watt-hours based on your essential load, desired runtime, inverter efficiency, and backup reserve.

Estimate how long a portable power station can run a device based on battery capacity, device wattage, inverter efficiency, and allowed depth of discharge.

Convert generator rotational speed in RPM to electrical output frequency in hertz based on the number of magnetic poles and optional slip adjustment. This calculator helps estimate alternator frequency for common 2-pole, 4-pole, 6-pole, and 8-pole generator configurations.

Estimate the recommended portable power station capacity based on your daily energy use, desired backup duration, inverter efficiency, and depth of discharge.

Estimate the recommended battery generator capacity in watt-hours based on your device load, runtime needs, surge power, battery reserve, and inverter efficiency.

Estimate the recommended continuous running load for an inverter generator based on generator size, intended load type, altitude derating, ambient temperature, and a safety reserve for startup surges and efficient operation.

Estimate inverter generator electrical efficiency as the percentage of fuel energy converted into usable AC output based on power output, runtime, fuel use, and fuel type.

Estimate how long an inverter generator can run based on fuel tank size, fuel level, load, and efficiency mode. The calculator estimates runtime by converting available fuel into usable watt-hours and dividing by the connected electrical load.

Estimate the recommended inverter generator running watt capacity based on the total running load, highest starting surge, desired reserve capacity, and altitude derating.

Calculate the synchronous speed of an AC generator based on supply frequency and number of poles. Includes an optional slip input to estimate actual rotor speed for comparison.

Calculate the synchronous rotational speed of an AC generator based on electrical frequency and number of poles, with optional outputs for rotor speed ratio and pole pairs.

Calculate generator output frequency based on engine speed, alternator poles, drive ratio, and slip factor. Useful for estimating whether a generator setup will produce the target AC frequency such as 50 Hz or 60 Hz.

Estimate the total running wattage needed from a generator based on the number of appliances, average running watts per appliance, continuous load margin, and power factor adjustment.

Estimate generator phase load balance as the percentage deviation between the highest-loaded phase and the average phase load, using three phase loads and generator rated capacity.

Estimate the percent load balance across a three-phase generator by comparing the highest and average phase loads, with an adjustment for power factor and operating reserve.

Calculate how much a generator is overloaded or underloaded based on its rated capacity, actual connected load, power factor, and a demand factor.

Estimate generator capacity headroom based on total running load, expected peak surge load, desired reserve margin, and altitude derating. The result shows the recommended generator size needed to maintain adequate headroom under operating conditions.

Estimate the total generator demand load in watts by combining running wattage of connected devices, startup surge allowance, desired safety margin, and power factor adjustment.

Estimate the total simultaneous running load a generator must support by summing the wattage of connected loads and applying a startup surge factor plus a safety margin.

Estimate the minimum generator size needed for a continuous electrical load, accounting for power factor, surge margin, and recommended maximum generator loading.

Estimate the generator size needed to handle peak electrical demand by combining running load, motor starting surge, demand margin, and power factor.